- This topic has 3 replies, 1 voice, and was last updated October 8, 2023 at 1:07 pm by Armuro.
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SCSalagean Constantin8 October 20230 Wish green leaves
Boxwood, defoliation in a circular pattern
Hello. In several spots on my boxwood there are defoliations in a circular pattern and under the fallen leaves there are new growths. It was treated with Topsin about a month ago. Is it a fungal infection again?
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Hello. Based on the attached photos, you are most likely dealing with a boxwood disease (possibly Box Blight, caused by phytopathogens such as Calonectria pseudonaviculata or Cylindrocladium buxicola). Thus, in the first instance, it is recommended to remove the severely affected leaves and portions of the plant, and then destroy them by burning. Subsequently, to control a wider spectrum of diseases, it is recommended to carry out a treatment with a fungicide such as Luna Experience, 10 ml, in a dose of 5 ml/10 L water, applied by foliar spraying, according to the instructions in the product description.
Also, in this period you can consider using a fertilizer with a high potassium content, such as Fertilizer 0-0-40 Azet HerbstKali, 2 kg, by spreading it around the plants, in a dose of 20 – 30 g / m², followed by incorporation and watering. It has the effect of increasing frost resistance and improving the water balance of trees and shrubs and can be applied to a wide range of plants, including lawns.
It is still advisable to monitor the evolution of the plants, and if you identify other symptoms, we are waiting for you to return with clear phorographs and a detailed description. For more information on how to care for these species, you can read our article: Boxwood, planting guide and care work.-
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Recommended articlesSCSalagean Constantin9 October 2023Hello. Thank you for the information. But if yesterday we applied Topsin +Lido…do we have to wait for a certain period until we can carry out the treatment with Luna Experience?
If you have removed all the damaged parts of the plant before the treatment, it is recommended to monitor the evolution of the plant and apply Luna Experience, 10 ml only if you notice again any symptoms of deterioration.
If you have not removed the parts of the plant that have been damaged before the fungicide treatment, it is recommended to do so (with sharp and disinfected tools – e.g. Power Pruner), followed by gathering and destroying everything that has fallen on the ground. Afterwards, at an interval of 7-14 days after the treatment, Luna Experience, 10 ml, can be applied.-
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